Improvement in hot-water feeders for steam-boilers



N. PETERS. PHOYO-UTHUGRAPHER. WASHINGTON. D, C.

,diritta entre Y JOHN n. MILLS, or BOSTON, AND JOHN HOWARTH,

'onusnrrs.

Letters Patent No. 110,668, dated January 3, `1871.

IMPROVEMENT IN HOT-WATER FEEDERS FOR STEAM-BOILERS..

The Schedule referred toin these Letters. Patent and making part of the same.

lVe, J OHN H. MILLS, of BostonfiSuffolk county, and JOHN HOWARTH, of Salem, in the county of Essex and .State of Massachusetts, have invented cer- .tain Improvements in Hot-water Feeders for Steam- Boilers'and Water-Elevators, ot" which the following is a specification. y

Figure 1 is a front elevation of our invention with a portion of the case broken away to show the internai construction;

Figure'2 is a side elevation;

Figure is a plan .view inverted;

Figure 4 is a sectional view of the heating apparatus;

Figure 5 is a sectional view of the ,valves G G'; Figure 6 is a section through line wat, gs. 2 and 3; Figure 7 is a side elevation of valve P, with its shaft; Figure 8 is a plan view of the latter invented; and 1 ligure 9, a sectional'viewof one oi' the chambers The object of this invention is to heat the'feed-water for steam-boilers by the exhaust steam from an engine to a degree of temperature approaching that of the steam; also, to precipitate the impurities contained in the water before it enters the boiler, andto feed said water to the boiler; also, to produce Yan apparatus for elevating water by the pressure' of' steam when 'dis- 'connected with the boiler-feed.

It consists of a cylindrical vessel, intol tn e top of which the cold water is admitted and divided into wsmall particles by falling on a flaring 'orconical cap over the pipe which admits the exhaust steam, whereby it is heated.

It also consists of two steam-tight chambers within said heater, into each of which the heated water is caused to How alternately, and from whence it is alternately expelled into the boilersupply-pipe by means of steam blasts iom'the'engiue, both of which operations, viz: the forcing ofthe water into the chambers' and the egress of the same, being effected by means of a peculiar arrangement of valves, which, with the Ageneral details of construction and method of operation, will be more fully describedhereinafter.

In the drawing- A represents the heater, which is provided with the vertical pipe D, through which exhaust steam is ad mitted at '.L.

U represents a circular ilangc on the top of pipe D.

E I represent conical plates, loca-ted one within the other and innncdiately above pipe D, as shown in 4.

, 'lhc plate E has an opening in the top to admit the cold-water supply-pipe V, while the plate I is solid, a conical space bcing left between them.

V Y represent valves to regulate the supply of-water, the latter valve being operated by a oat,X, which rests upon the surface ot' the water in heater A. The valve V is to shut ofi the supply when the heater is not in use.

F F represent steam-tight vessels within the heater A, and communicating, through the bottom of' the latten-with pipes J JK K.

H H represent bent pipes leading from the lower .portion of heat-cr A to the double check-valves Gr Gr', iig. 5, which latter being the invention of one Greene, (of the iirm of Greene, York city,) neednot be particularly described.

C represents 'aI steam valve-chest, located at the back of heater A,'aud provided with the disk-valve P, which is attached to the vertical shaft M, on the upper end of which is the graduated pulley N.

- The valve P is provided on its under side with the oblong port R, andhas an orifice, S, on the opposite side, extending entirely thro-ugh.

The pipes J J connect valves G G with the lower portions of `chambers F F', and the. pipes K E. connect the, upper portions of the same with the valve chest C, as shown in iigs. 3 and 9.

L represents the exhaust-pipe from chest O, which pipe opens into heater A above the high-water line, and enters the bottom of chest G, between pipes KK, exactly in the-center of tnc space between the latter, and the distance between each of the pipes K K and L is exactly equal to the length of thel port R, and from the port lt to the orioe S.

W represents an opening inthe top of' heater Afor the escape of the exhaust steam after it has performed its function.

Operation..

The lexhaust steam assinff u 1 thi-ouch pipeD imi p a l o 1 pinges on the underside of conical plate I, heating the same and passing out under its edges upward; at the same time cold .water is admitted through the .supply-v pipe and falls upon the upper side of plate I, where it is scattered into ne particles,ioutward, against the sides of heater A, and, by Contact with the heated/ plate I, and mingling with the exhaust steam, becomes thoroughly heated to vnearly the temperature of the latter, and, accumulating in the bottom ofthe heater,

will deposit vits impurities, which can be removed as occasion requires. The exhaust steam, which is not absorbed' bythe above operation, passes ofi" Athrough orifice YV, as above mentioned. lhe valve P is slowly revolved by belting or gearing, and steam is admitted to theehest O through orifice W, above valve P. 1t

or` SALEM, Massn- Trowbridge 85 Baldwin, Newk will be seen that, wlicn the valve occupies Vthe position shown in g. 6, the port R will connect with the pipes K and L, and the pipe K-will connect with orifice S, thus allowing the steam in chamber F' to exhaust through pipes Ii and L into the upper part of heater A, (supposing chamber F tohave been filled with steairnwhile the steam which enters chest G through orifice N has a free passage into chamber F through orifice S and pipe K. Supposing the chamber F to have been filled with water from the heater A; by means of the valve G and pipes H I, it will be seen that, at the same moment that the chamber F' is exhausted, steam is admitted to-the chamber F, and, g bearing with full pressure on the surface of the water therein, forces it downward, through pipe J, between valves 1 'and 2 of valve G, and, pressing downward upon valve 1, forces it more firmly into its seat and prevents it from opening. While pushing upward on valve 2, the Water rises and flows into the T-shaped coupling and through the boiler supply-pipe Z, as indicated by the arrows. Y p

While this operation continues water from heater A flows through pipe H intopvalve Gr, and, raising valve 3, flows through pipe J into chamber F', (which, as before described, is exhausted of steann) and fills the sameat the moment that the chamber F is emptied. Ihe chamber F is now filled with steam, while F is nearly filled with water; at this point the valve P is so revolved as to bring the port E into connection with the pipes L and K, and the orifice S into connection with the pipe K', which will exhaust chamber F and force steam into chrunber F', heilig simply the reverse of the previous operation, the water rushing out through valve G', pipe J', and into the boilersupply Z, and the water from heater A rushing in through valve G and pipes I-I J and filling chamber F.

`The valves I and 3, fig. 5, are provided with stems 5, which project upward through stuffing-boxes, and are adj usted by hand-wheels 6, to regulate the flow of water through said valves, thus controlling the amount of water flowing into the chambers F F', independently of the valve I. v Having thus fully described our invention What we claim as new. and desire to secure by Letters Patent, is

l. The arrangement for heating the feed-water, con

sisting of the exhaust-pipe D and conical plates E I, substantially as described.

2. The arrangement of' the chambers F F', heat-er A, and chest C, as specied.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JOHN H. MILLS.i JOHN HONVAR'IH.

Witnesses J. O. HAYDEN, CHARLES F. BROWN. 

